What is Erlang?

Erlang is a concurrent, fault-tolerant, distributed functional programming language. It's designed for building highly scalable and reliable systems, often used in telecommunications, banking, e-commerce, and instant messaging applications where uptime and responsiveness are critical. Erlang's concurrency model, based on lightweight processes and message passing, enables handling a large number of concurrent operations efficiently. Its fault-tolerance is achieved through a supervision tree mechanism that automatically restarts failing processes, ensuring system stability.